Hingham Bay is the easternmost of the three small bays of outer Boston Harbor, part of Massachusetts Bay and forming the western shoreline of the town of Hull and the northern shoreline of Hingham in the United States state of Massachusetts.
It lies east of Quincy Bay and is met at the southwest by the mouth of Weymouth Fore River, also forming part of the waterfront of Weymouth. The bay is home to several of the Boston Harbor Islands.
